\pmThe plus-minus symbol (\pm) is used to indicate a choice between two possible values, one with a plus sign and one with a minus sign. It is commonly used in mathematics to express the result of an operation that can have two outcomes, such as the solutions to a quadratic equation.
Solutions to a quadratic equation
x = \frac{-b \pm \sqrt{b^2 - 4ac}}{2a}A value that can be either 5 + 2 or 5 - 2
y = 5 \pm 2Square root of a number, indicating both positive and negative roots
\pm \sqrt{9} = \pm 3